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研究中对低压渗流制备方法进行了改进，并对制备的样品用驻波管法进行了吸声系数的测定。结果表明，样品随孔径的减小、空隙率的增大，综合吸声系数有增大的趋势。
In this study, the preparation method of low pressure seepage was improved, and the sound absorption coefficient was measured by the standing wave tube method. The results show that with the decrease of the pore diameter and the increase of porosity, the overall sound absorption coefficient tends to increase.